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<title>CANCERLIT&#174; Retired, NCI and NLM Collaborate to Improve Access to Cancer-Related PubMed Citations. NLM Technical Bulletin. 2003 Mar-Apr</title>
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<meta name="DC.Subject.Keyword" content="Automatic Term Mapping" />
<meta name="DC.Subject.Keyword" content="Cancer" />
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<tr><td width="30">&nbsp;</td><td width="470"><font size="2"><strong>April 15, 2003</strong> [posted]</font><br /></td><td width="30">&nbsp;</td></tr>
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<tr><td width="30">&nbsp;</td><td width="470"><font size="5"><strong>CANCERLIT<sup><font size=-2>&#174;</font></sup>
Retired, NCI and NLM
Collaborate to Improve Access to Cancer-Related PubMed Citations</strong></font><br /></td><td width="30">&nbsp;</td>
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s of April 4, 2003, the National Cancer Institute (NCI) has retired its CANCERLIT database and is linking
users of NCI's <a href="http://Cancer.gov">Cancer.gov</a> Web site directly to NLM's PubMed<sup><font size=-2>&#174;</font></sup> database for
journal citations. NCI and NLM
are working together in several ways to improve access to cancer-related citations in PubMed.
</p>
<p><strong>Improvements In Progress</strong><br />
NCI and NLM will develop and maintain a Cancer Subset on PubMed to help searchers who want to
limit their results to cancer-related citations. This subset should be available for use by the
end of April; in the interim, NCI is advising its users to append the word <strong>cancer</strong> to searches they
wish to restrict in this way, as this will accomplish most of the desired effect. Following initial
implementation of the cancer subset, NCI and NLM will review the subset strategy at least annually
to ensure that it remains current and comprehensive.
</p>
<p>
NCI's specialized <a href="http://cancer.gov/search/search_cancertopics.aspx">
Cancer Topic Searches</a> have been expanded and redefined to return results directly from
PubMed, and efforts are underway to further extend the scope and availability of this service. Users should
check this convenient list of searches to see if the specific cancer topic they want to search has
already been developed as a strategy, e.g., bone sarcoma. If so, the PubMed results are only a click
away and the baseline strategy can be adjusted further, if desired.
</p>
<p>
At some point in the future, the new NCI Thesaurus will be inserted into the UMLS Metathesaurus.
The UMLS is part of PubMed's <a href="http://www.ncbi.nlm.nih.gov/entrez/query/static/help/pmhelp.html#AutomaticTermMapping">Automatic Term Mapping</a>, so searches will include the appropriate
MeSH concept term for the cancer term. Until that implementation, terms that do not map to MeSH
vocabulary can be entered using double quotes, as NCI and NLM have augmented the PubMed index of
searchable terms with over 17,000 phrases from the NCI Thesaurus not previously
found in the PubMed index, e.g., <strong>"surface osteosarcoma"</strong>. The new NCI Thesaurus currently includes
some 5,500 neoplasm concepts with 35,000 synonyms as well as
some 20,000 other concepts often related to cancer.
</p>
<p><strong>Background</strong><br />
For nearly 30 years, CANCERLIT combined cancer-related MEDLINE citations with a much smaller
number of meeting abstracts, monographs, and other materials. Almost all of these materials
have become directly accessible via the Web, and NCI stopped adding these extra contents after
1999. As the clinical and research value of CANCERLIT's added content diminished, and PubMed's
features improved, NCI decided that the costs and delays of creating a separate
database were no longer warranted.
</p>
<p>
NCI is exploring ways to help provide access to any such materials of continuing value.
One of the most-used additions was meeting abstracts from the American Society of Clinical
Oncology (ASCO); NCI has provided ASCO with a full set of abstracts from 1995-1999, to fill
in its Web-accessible collection of meeting abstracts.
</p>
<p>
For more information or to ask a specific question about the changes to Cancer.gov's cancer
literature search options, please use the Cancer.gov
<a href="http://cancer.gov/contact/form_contact.aspx">Contact Us</a> form or send an email message to
<a href="mailto:ncicancergovstaff@mail.nih.gov">ncicancergovstaff@mail.nih.gov</a>. Special arrangements
regarding access to
CANCERLIT contents may also be discussed with Dr. Richard Manrow at (301) 496-9096.
</p>
<br /><br />
<p>
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<strong>By Larry Wright</strong><br />
<strong>NCI Office of Communications/Office of Cancer Information Products and Systems</strong><br />
</p>
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<p><strong>Indexing Terms</strong></p>
<p>Cancer, CANCERLIT retired</p>
<p>Cancer, Cancer related citation access improved in PubMed</p>
<p>PubMed, Cancer related citation access improved</p>
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<em>Wright L. CANCERLIT<sup><font size=-2>&#174;</font></sup> Retired, NCI and NLM
Collaborate to Improve Access to Cancer-Related PubMed Citations. NLM Tech Bull. 2003 Mar-Apr;(331):e9.</em>
<!--************************end citation information********************************-->
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